Reinforced concrete tie.



W. DUNSON.

REINFOBUED CONCRETE TIE APPLICATION FILED MAB.27,

Patented Jan. 12, 1909.

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INVENTOR WTNESSES ATTUHNEY WILLIAM DUNSON, OF INDIANAPOLIS, INDIANinnmroncnn CONCRETE Tm.

un. ooasjrs.

Specification of Letters Patent Patented Jan. 12, 1909i Applicationfiled March 27, 1908. Serial No. 423,632.

Lo au whom 'it may concern:

Be it known that I, WILLTAM DUNsoN, citizen of the United States,residing at Indiana olis, -in the county of Marion and State o Indiana,have invented certain new and useful Im rovements in Reinforced ConcreteTies, o which the following is a specification, reference being hadtherein to t e accompanying drawing.

This invention relates to an improvement in reinforced concrete railwayties hereinafter described in the specification and pari -ticularlypointed out in the claims.

The object of this invention is to provide a reinforcing means for strenthening the concrete body portion of the tie to prevent disinte ationthereof due to the jarring caused by t e passage of trains along thetrack and restinon said tie, to construct such a tie that t e reinforcinmeans thereof will be completely-surroun ed on all sides and envelo edby the concrete to protect the metal, of w ch the reinforcing means' isconstructed, from the action of the atmosphere; also, to construct suchreinforcing means with in tegral block receiving chairs in the recess ofwhich cushion blocks of a resilient material,

are itted upon which said rails rest and to which they are spiked orotherwise secured. I attain these obJects by means of the reinforcedconcrete tie illustratedin the accompanying drawings in which likenumerals of reference designate like parts throughout the several views.

Figure 1 is a top view of my tie; Fig. 2 is a longitudinal sectionalview of the same, taken along the line 2-2 in Fig. 1; Fig. 3 is atransverse sectional view of the tie taken along the line 3-3 in Figs. 1and 2; Fig. 4 is a transverse sectional view Vof the tie taken along theline 4-4 in Figs. 1 and 2; and, Fig. 5 is a view of the mold showing thereinforcing core situated therein and. the concrete molded around it.

The metallic core portion of the tie, is ro vided with block holdingchairs each of w ich is composed of t e base portion 1 and the infclined side ortions 2 and 3 forming a block reciv' dliannel into which adovetail formed block 4 of an elastic material, such as Wood, is tted toform a cushion whereon the rails 5 rest and are secured by spikes 6inthe `usual manner. The sides 2 and 3 are reinforced by the `braces 7and 8 which extend p5 from the reifgorcingtie bar to the to sideportions of the sides 2 and 3, and said races are provided for thepurpose of maintaining said sides rigidly in position and preventingthem being spru outwardly, so that sai l vblocks 4 will atal times fitsnugly between them. The block receivingfchannels formed by the sides 2and 3, .are ta ered in a longitudinal direction, so that t e wider endof the channel of the chair, situated at one end of the tie, will besituated at the front edge of the tie, while the Wider side of thechannel of the chair will be situated at the rear edge of the tie or inother words the longitudinal tapers of said channels in each tie willalternate necessitating the dovetailed cushion block to be driven intothe channels situated at one end of the tie from the front ed ev of thetie and the other dovetailed cus ion block to be driven into thechannel, situated at the other end of the tie, from the rear edgethereof, so that While a train is moving in one direction over the railsit will tend to move; the rail situated at* the one end of the tielongitudinally to loosen the cushion block on which it bears, the oposite companion rail will tend to tighten t e cushion block on which itbears. n

The chairs 'are connected' and tied`to main- `tain their proper distanceapart by a connecting means comptpsed of the upper arch bar member 9 andt e lower arch ar member 10, and said chairs are connected thus in orderto secure the proper amount of elasticity and strength to the tie so asto avoid an excessive degree of bending movement being applied to theconcrete portion of the tie yto prevent a crumbling ordisintegrationthereof.

The construction of this tie is accomlished with facility and cheapnessas folowst-The metallic reinforcing core of the tie is placed inosition, edgewise in a suitable rectangular mo ding flask, as therectangular moldinv 'iiask, shown in Fig. 57 and the concrete willich ismade very liquid, is oured around the reinforcing core compose of thechairs and the arch bars, previo scribed and into the spaces situate@etween the diierent members oi said reinforcing core, to completelysurround and inclose sai core to form a solid compact body.

l claim:

1. ln a reinforced concrete tie, the combination with end chair membershaving lock receiving channels, said annels being narrower at their topportions than their bottom portions and tapered toward one of their.ends, oi upper and ower bar members connecting said chairs, and aconcrete bodf surrounding and in'closing Seid chairs en said upper andlower bar connecti members.

` 2. In e reinforced concrete tie, the combination with end chairmembers having block receiving channels, said channels being nur rowerat their top ortions than their bottom portions and the c mnnel situatedet one end of said tie, tapered longitudinally sind opvosite to thelongitudinal hiper of thc ot 1er companion channel, of upper and lowerarch bar members havin their concave sides facing each other anconnecting said chairs, and a, concrete bod surrounding and inclosinseid chair mem ers and said arch bars.

n testimony whereof I affix my signature in presence of two Witnesses.

WILLIAM DUNSON.

Witnesses:

THOMPSON R. BELL,Y FRANCIS M. SPRINGER.

